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WO2007125299A1 - Agencement de dispositifs de chauffage electrique radiants - Google Patents

Agencement de dispositifs de chauffage electrique radiants Download PDF

Info

Publication number
WO2007125299A1
WO2007125299A1 PCT/GB2007/001484 GB2007001484W WO2007125299A1 WO 2007125299 A1 WO2007125299 A1 WO 2007125299A1 GB 2007001484 W GB2007001484 W GB 2007001484W WO 2007125299 A1 WO2007125299 A1 WO 2007125299A1
Authority
WO
WIPO (PCT)
Prior art keywords
arrangement
shoulder
heater
peripheral portion
supporting dish
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB2007/001484
Other languages
English (en)
Inventor
Kevin David Roberts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ceramaspeed Ltd
Original Assignee
Ceramaspeed Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ceramaspeed Ltd filed Critical Ceramaspeed Ltd
Publication of WO2007125299A1 publication Critical patent/WO2007125299A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater

Definitions

  • This invention relates to an arrangement of radiant electric heaters in which a plurality of heaters are arranged in a stack.
  • the heater It is conventional with radiant electric heaters for glass ceramic top cookers to provide the heater with a dish of suitable material, such as metal, the dish being formed with a shoulder at a lower peripheral edge thereof so as to form a recess having an upper surface at a level above a plane of a lower surface of the dish and a peripheral surface set back from a periphery of the heater.
  • Such recess is generally provided with an array of through-holes in the upper surface thereof so as to facilitate the mounting of components of the heater, such as a temperature-limiting device, and accessories and to provide a means for mounting the heater in an electric cooker.
  • each heater In order to transport the heaters from a heater manufacturer to an electric cooker manufacturer, it is conventional to provide packaging for each heater in the form of cardboard or the like which generally extends beneath the heater and around the sides thereof to a sufficient height to allow similarly packaged heaters to be stacked one on top of another.
  • each radiant heater comprising: a supporting dish having a substantially planar base and an upstanding peripheral portion and a shoulder formed around a junction between the base and the peripheral portion, the shoulder comprising an upper surface extending radially inwardly from the peripheral portion of the supporting dish and a peripheral surface extending between an inner edge of the upper surface and an outer edge of the substantially planar base; a base layer of thermal insulation material provided in the supporting dish; a heating element supported relative to the base layer of thermal insulation material; a peripheral wall of thermal insulation material extending around an inner side of the peripheral portion of the supporting dish; and a temperature-responsive device extending through the peripheral portion of the supporting dish and at least partly across the heater,
  • the temperature-responsive device is attached to an outer side of the peripheral portion of the supporting dish in such a manner that the temperature- responsive device does not extend below the upper surface of the shoulder and does not extend above the peripheral wall, and the radial extent of the upper surface of the shoulder is greater than the radial extent of the peripheral wall, whereby the peripheral surface of the shoulder of an upper heater fits within the peripheral wall of a lower heater with the upper surface of the shoulder of the upper heater being supported on an upper surface of the peripheral wall of the lower heater.
  • the upper surface of the shoulder may extend substantially parallel to the plane of the substantially planar base.
  • the supporting dish may comprise metal.
  • the base layer of thermal insulation material may comprise compressed microporous thermal and electrical insulation material.
  • the arrangement may include an array of through holes provided in the upper surface of the shoulder.
  • the heating element may be selected from a corrugated ribbon embedded edgewise in the base layer, a helical coil of resistance wire and a halogen lamp.
  • the peripheral wall may be selected from compacted vermiculite and compressed microporous material.
  • the peripheral wall may extend a short distance above an upper edge of the peripheral portion of the supporting dish.
  • the temperature-responsive device may be selected from a differential expansion device and a PRT device.
  • the temperature-responsive device may be secured to the supporting dish by way of a mounting plate.
  • the mounting plate may be arcuate.
  • the mounting plate may be provided with a plurality of hooks for engaging with the peripheral portion of the supporting dish.
  • the mounting plate may be formed with at least one aperture for a threaded fastener.
  • the lower edge of the mounting plate may not extend below the peripheral portion of the supporting dish.
  • the upper edge of the mounting plate may not extend above the upper edge of the peripheral portion of the supporting dish.
  • the temperature-responsive device may incorporate a temperature probe which is at a level below the upper surface of the peripheral wall of the lower heater by a greater distance than the height of the peripheral surface of the shoulder of the upper heater.
  • FIG. 1 is a cross-sectional view through a part of a stack of radiant electric heaters in accordance with the present invention.
  • the figure shows a stack of radiant electric heaters 1. Three heaters are shown for the purpose of illustration, although the actual number of stacked heaters will generally be more than three, and only part of each heater is shown, the left- hand part of each heater being essentially a mirror image of the right-hand-part but without a temperature-limiting device.
  • Each heater comprises a supporting dish 3, for example of metal, in which there is arranged a base layer 5 of thermal insulation material, such as compressed microporous thermal and electrical insulation material.
  • the supporting dish 3 has an upstanding peripheral portion 11 and a substantially planar base 13.
  • the supporting dish 3 is formed with a shoulder 25 at a lower edge of the upstanding peripheral portion 1 1 of the dish so as to form a recess having an upper surface at a level above the plane of the substantially planar base 13 of the dish and a peripheral surface set back from a peripheral portion 11 of the dish.
  • Such recess is generally provided with an array of through-holes in the upper surface thereof so as to provide a means for mounting the heater in an electric cooker.
  • a heating element 7 is supported relative to the base layer 5 of thermal insulation material.
  • the heating element 7 comprises a corrugated ribbon of electrical resistance material embedded edgewise into the base layer 5 of thermal insulation material.
  • the heating element may comprise a helical coil of resistance wire, a halogen lamp or any other conventional heating element.
  • a peripheral wall 9 of thermal insulation material extends around the inner side of the peripheral portion 11 of the supporting dish 3.
  • the peripheral wall 9 may be made of compacted vermiculite, compressed microporous material or other suitable material.
  • the peripheral wall 9 extends a short distance above the upper edge of the peripheral portion 11 of the supporting dish 3.
  • a temperature-responsive device 15 mounted to the external side of the peripheral portion 11 of the supporting dish 3 is a temperature-responsive device 15 of conventional type, such as a differential expansion device as illustrated or a PRT device.
  • the illustrated temperatu re-responsive device 15 includes a temperature probe 17 which extends at least partly over the heating element 7 and a switch head 19 located externally of the supporting dish 3.
  • the temperature-responsive device 15 is secured to the external side of the peripheral portion of the supporting dish 3 by way of an arcuate mounting plate 21 which is formed with a pair of hooks which engage with the peripheral portion 11 of the supporting dish 3 and with at least one aperture for a threaded fastener 23.
  • the mounting plate 21 is dimensioned such that the lower edge thereof does not protrude below the peripheral portion of the supporting dish 3 and such that the upper edge thereof does not protrude above the upper edge of the peripheral portion 11 of the dish.
  • the upper surface of the shoulder 25 extends radially inwardly by a distance greater than the radial thickness of the peripheral wall 9, while the temperature probe 17 of the temperature-responsive device 15 is arranged at a level below the upper edge of the peripheral wall 9 by a distance greater than the height of the peripheral surface of the shoulder 25. That is, the radial extent of the shoulder 25 is greater than it would conventionally be.
  • Such an arrangement allows the heaters to be stacked with the peripheral surface of the shoulder 25 of an upper heater fitting within the peripheral wall 9 of a lower heater, and the upper surface of the shoulder 25 of the upper heater supported by an upper surface of the peripheral wall 9 of the lower heater, while the substantially planar base 13 of the upper heater is spaced above the temperature probe 17 of the lower heater.
  • the temperature-responsive device 15 is mounted to the peripheral portion 11 of the supporting dish 3 and not to the upper surface of the shoulder 25 as in known heaters, the mounting plate 21 of the temperature-responsive device 15 of the upper heater does not interfere with the upper surface of the peripheral wall 9 of the lower heater.
  • the present invention in which radiant electric heaters can be stacked directly one on top of another allows for a denser packing arrangement than has hitherto be possible, while at the same time reducing the amount of packaging materials required.
  • the upper surface of the recess 25 may still be provided with an array of through holes (not shown) for example for the attachment of accessories after delivery to an appliance manufacturer and/or to facilitate mounting the heater in an electric cooker, but such through holes are not used for mounting the temperature-responsive device.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

L'invention concerne une pluralité de dispositifs de chauffage électrique radiants qui sont empilés l'un sur l'autre. Chaque dispositif de chauffage (1) incorpore un dispositif sensible à la température (15) fixé sur un côté extérieur d'une partie périphérique (11) d'une cuvette de support (3) du dispositif de chauffage de manière telle que le dispositif sensible à la température ne s'étende pas en dessous de la surface supérieure d'un épaulement (25) formé autour d'une jonction entre la partie périphérique (11) et une base sensiblement plane (13) de la cuvette de support (3) et ne s'étende pas au-dessus d'une paroi périphérique de matériau d'isolation thermique qui s'étend autour d'une surface intérieure de la partie périphérique. L'extension radiale d'une surface supérieure de l'épaulement (25) est supérieure à l'extension radiale de la paroi périphérique (9) de telle sorte qu'une surface périphérique de l'épaulement (25) d'un dispositif de chauffage supérieur (1) s'adapte à l'intérieur de la paroi périphérique (9) d'un dispositif de chauffage inférieur (1), la surface supérieure de l'épaulement (25) du dispositif de chauffage supérieur (1) étant supportée sur une surface supérieure de la paroi périphérique (9) du dispositif de chauffage inférieur (1).
PCT/GB2007/001484 2006-04-29 2007-04-23 Agencement de dispositifs de chauffage electrique radiants Ceased WO2007125299A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0608522.9 2006-04-29
GB0608522A GB0608522D0 (en) 2006-04-29 2006-04-29 Arrangement of radiant electric heaters

Publications (1)

Publication Number Publication Date
WO2007125299A1 true WO2007125299A1 (fr) 2007-11-08

Family

ID=36590065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/001484 Ceased WO2007125299A1 (fr) 2006-04-29 2007-04-23 Agencement de dispositifs de chauffage electrique radiants

Country Status (2)

Country Link
GB (1) GB0608522D0 (fr)
WO (1) WO2007125299A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542142A2 (fr) * 1991-11-12 1993-05-19 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Unité de chauffage à radiation
DE4438648A1 (de) * 1994-10-28 1996-05-02 Ego Elektro Blanc & Fischer Strahlungsheizkörper
EP1139696A2 (fr) * 2000-03-23 2001-10-04 Ceramaspeed Limited Ensemble de chauffe rayonnant
US20020121510A1 (en) * 2000-09-07 2002-09-05 Heinz Petri Radiant heater
WO2002102115A1 (fr) * 2001-06-08 2002-12-19 Ceramaspeed Limited Systeme de chauffage electrique par rayonnement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542142A2 (fr) * 1991-11-12 1993-05-19 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Unité de chauffage à radiation
US5489764A (en) * 1991-11-12 1996-02-06 E.G.O. Electro-Gerate Blanc U Fischer Radiant heating cook-top with biased temperature sensor
DE4438648A1 (de) * 1994-10-28 1996-05-02 Ego Elektro Blanc & Fischer Strahlungsheizkörper
EP1139696A2 (fr) * 2000-03-23 2001-10-04 Ceramaspeed Limited Ensemble de chauffe rayonnant
US20020121510A1 (en) * 2000-09-07 2002-09-05 Heinz Petri Radiant heater
WO2002102115A1 (fr) * 2001-06-08 2002-12-19 Ceramaspeed Limited Systeme de chauffage electrique par rayonnement

Also Published As

Publication number Publication date
GB0608522D0 (en) 2006-06-07

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